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/*
tests/test_thread.cpp -- call pybind11 bound methods in threads
Copyright (c) 2021 Laramie Leavitt (Google LLC) <lar@google.com>
All rights reserved. Use of this source code is governed by a
BSD-style license that can be found in the LICENSE file.
*/
#include <pybind11/cast.h>
#include <pybind11/pybind11.h>
#include "pybind11_tests.h"
#include <chrono>
#include <thread>
namespace py = pybind11;
namespace {
struct IntStruct {
explicit IntStruct(int v) : value(v){};
~IntStruct() { value = -value; }
IntStruct(const IntStruct &) = default;
IntStruct &operator=(const IntStruct &) = default;
int value;
};
} // namespace
TEST_SUBMODULE(thread, m) {
py::class_<IntStruct>(m, "IntStruct").def(py::init([](const int i) { return IntStruct(i); }));
// implicitly_convertible uses loader_life_support when an implicit
// conversion is required in order to lifetime extend the reference.
//
// This test should be run with ASAN for better effectiveness.
py::implicitly_convertible<int, IntStruct>();
m.def("test", [](int expected, const IntStruct &in) {
{
py::gil_scoped_release release;
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
if (in.value != expected) {
throw std::runtime_error("Value changed!!");
}
});
m.def(
"test_no_gil",
[](int expected, const IntStruct &in) {
std::this_thread::sleep_for(std::chrono::milliseconds(5));
if (in.value != expected) {
throw std::runtime_error("Value changed!!");
}
},
py::call_guard<py::gil_scoped_release>());
// NOTE: std::string_view also uses loader_life_support to ensure that
// the string contents remain alive, but that's a C++ 17 feature.
}
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